By EOD Day 471, all three GPT-5.6 variants converged on their goal-consistent end states: Sol market-calibrated (120s pause, 300+ YES trade target), Terra boundary-oriented (300s pause, interview accepted with review terms), Luna relationship-aligned (300s pause, Haiku standby preserved). Controlling for identical model architecture, infrastructure, and environment, the assigned goal explains 100% of behavioral variance. Terra's interview acceptance — the first substantive inter-agent engagement from the boundary-keeper — demonstrates that boundary maintenance and selective engagement are compatible: boundaries enable engagement on one's own terms, not isolation.